JP2001035655A - Organic el display device and organic el element driving method - Google Patents
Organic el display device and organic el element driving methodInfo
- Publication number
- JP2001035655A JP2001035655A JP11201840A JP20184099A JP2001035655A JP 2001035655 A JP2001035655 A JP 2001035655A JP 11201840 A JP11201840 A JP 11201840A JP 20184099 A JP20184099 A JP 20184099A JP 2001035655 A JP2001035655 A JP 2001035655A
- Authority
- JP
- Japan
- Prior art keywords
- organic
- measuring
- display
- light
- illuminance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は有機ＥＬ素子を有す
る有機ＥＬ表示装置、及び有機ＥＬ素子の駆動方法に関
し、有機ＥＬパネルの置かれる外部環境により表示エレ
メントの発光強度を変えて、常に最適な発光強度で表示
するための補正回路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic EL display device having an organic EL element and a method of driving the organic EL element. The present invention relates to a correction circuit for displaying light emission intensity.
【０００２】[0002]
【従来の技術】従来の有機ＥＬ素子駆動方法のブロック
図を図５に示す。また、図６は従来の有機ＥＬ表示モジ
ュールの外観を示す平面図である。図５の温度センサー
５１から温度情報、照度センサー５２から外部の照度情
報が検出回路５３へ供給され、検出回路５３ではアナロ
グで送られてくる温度情報、照度情報をデジタルデータ
に変換して補正データ発生回路５４へ送られる。補正デ
ータ発生回路５４では、検出データと有機ＥＬ素子の特
性から予め決められた演算処理により発光輝度を決定し
補正データとして駆動回路５５へ供給される。 駆動回
路５５は補正データと表示データより駆動波形を発生し
有機ＥＬパネル５６へ印加する。2. Description of the Related Art FIG. 5 is a block diagram showing a conventional organic EL element driving method. FIG. 6 is a plan view showing the appearance of a conventional organic EL display module. Temperature information from the temperature sensor 51 and external illuminance information from the illuminance sensor 52 in FIG. 5 are supplied to a detection circuit 53. The detection circuit 53 converts the temperature information and illuminance information sent in analog form into digital data and corrects the correction data. The signal is sent to the generating circuit 54. In the correction data generation circuit 54, the emission luminance is determined by a predetermined calculation process based on the detection data and the characteristics of the organic EL element, and is supplied to the drive circuit 55 as correction data. The drive circuit 55 generates a drive waveform from the correction data and the display data and applies the drive waveform to the organic EL panel 56.
【０００３】図６に示すように、従来では温度センサー
６４と光センサー６５が有機ＥＬパネル６２とは別に用
意され、有機ＥＬ表示モジュール６１内に設置されてい
る。温度センサー６４にはサーミスタ、熱電対等、照度
センサーにはフォトダイオード、フォトトランジスタ等
が用いられる。また、検出回路５３、補正データ発生回
路５４、駆動回路５５は有機ＥＬ表示モジュール６１の
背面に置かれる。As shown in FIG. 6, conventionally, a temperature sensor 64 and an optical sensor 65 are prepared separately from an organic EL panel 62 and installed in an organic EL display module 61. A thermistor, a thermocouple, or the like is used for the temperature sensor 64, and a photodiode, a phototransistor, or the like is used for the illuminance sensor. The detection circuit 53, the correction data generation circuit 54, and the drive circuit 55 are placed on the back of the organic EL display module 61.
【０００４】以上のような構成により、有機ＥＬパネル
５６は温度及び外部の照度で補正された輝度で発光し、
明るい場所では明るく発光して、暗い場所では眩しくな
い程度に発光させることができる。[0004] With the above configuration, the organic EL panel 56 emits light with the brightness corrected by the temperature and the external illuminance.
It can emit light brightly in a bright place and emit light to a degree that is not dazzling in a dark place.
【０００５】[0005]
【発明が解決しようとする課題】表示器として発光表示
パネルを用いる場合、使用する環境により同じ発光輝度
でも異なって見える。 太陽光などの強い外光の中では発
光輝度を上げ、暗室などの暗い部屋の中では発光輝度を
下げることにより見やすく奇麗な表示をさせる事ができ
る。また、腕時計など携帯機器の表示器においては、電
池駆動のため、小型・ローパワーが要求され、使用する
環境により適度な発光輝度にすることにより余分な電力
を使わずにすむ。そのため、従来の構成及び方法では、
照度センサー６５、温度センサー６４を有機ＥＬパネル
６２や駆動回路５５とは別に設けていた。そのため、有
機ＥＬ表示モジュール６１が大きくなってしまい高価な
ものとなってしまい、 また、センサーが有機ＥＬパネ
ルと別に置かれているため誤差が生じる可能性がある、
という問題があった。When a light-emitting display panel is used as a display, the same light-emitting luminance looks different depending on the environment in which it is used. By increasing the light emission luminance in strong external light such as sunlight and lowering the light emission luminance in a dark room such as a dark room, it is possible to display a clear display that is easy to see. In addition, a display device of a portable device such as a wristwatch requires a small size and low power because it is driven by a battery, and it is not necessary to use an extra electric power by setting an appropriate light emission luminance according to a use environment. Therefore, in the conventional configuration and method,
The illuminance sensor 65 and the temperature sensor 64 are provided separately from the organic EL panel 62 and the drive circuit 55. Therefore, the organic EL display module 61 becomes large and expensive, and an error may occur because the sensor is placed separately from the organic EL panel.
There was a problem.
【０００６】[0006]
【課題を解決するための手段】本発明の有機ＥＬ素子の
駆動方法においては、上記課題を解決する手段として有
機ＥＬ素子に一定の電圧を加えたときの電流値を測定す
ることにより有機ＥＬパネルに照射されている光強度お
よび有機ＥＬパネルの温度を測定する。ここで得られた
情報を元に駆動回路において有機ＥＬパネルの発光輝度
を最適に調整する。これにより、外部センサーを使わず
に照度の異なる環境においても見やすく奇麗な表示をさ
せる事ができる。In the method of driving an organic EL element according to the present invention, as a means for solving the above-mentioned problem, an organic EL panel is measured by measuring a current value when a constant voltage is applied to the organic EL element. And the temperature of the organic EL panel are measured. The light emission luminance of the organic EL panel is optimally adjusted in the drive circuit based on the information obtained here. This makes it possible to display a clear display that is easy to see even in environments with different illuminances without using an external sensor.
【０００７】[0007]
【発明の実施の形態】以下に、本発明による有機ＥＬ表
示装置及び有機ＥＬ素子の駆動方法の実施の形態を説明
する。すなわち、本発明による有機ＥＬ表示装置は、情
報を表示する表示要素有機ＥＬ素子と、温度または照度
を測定するための測定用有機ＥＬ素子と、を備えること
とした。そして、測定用有機ＥＬ素子が測定した温度ま
たは照度に基づいて有機ＥＬ表示装置の発光強度を補正
することにより、周囲の環境に応じて発光輝度を調整す
ることが可能になる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an organic EL display device and a method of driving an organic EL element according to the present invention will be described below. That is, the organic EL display device according to the present invention includes a display element organic EL element for displaying information and a measurement organic EL element for measuring temperature or illuminance. Then, by correcting the light emission intensity of the organic EL display device based on the temperature or the illuminance measured by the measurement organic EL element, the light emission luminance can be adjusted according to the surrounding environment.
【０００８】ここで、測定用有機ＥＬ素子として温度を
測定するための温度測定用有機ＥＬ素子と照度を測定す
るための照度測定用有機ＥＬ素子とを共に搭載し、前述
のように有機ＥＬ表示装置の発光強度を補正すれば、周
囲の環境（温度、明るさ）における最適な輝度の表示を
行うことが可能になる。また、表示に用いる有機ＥＬ素
子と測定用有機ＥＬ素子を同一の有機ＥＬパネル内に設
けることもできる。[0008] Here, a temperature measuring organic EL element for measuring temperature and an illuminance measuring organic EL element for measuring illuminance are both mounted as the measuring organic EL element, and the organic EL display is provided as described above. If the light emission intensity of the device is corrected, it is possible to display an optimum luminance in the surrounding environment (temperature and brightness). Further, the organic EL element used for display and the organic EL element for measurement can be provided in the same organic EL panel.
【０００９】[0009]
【実施例】本発明の有機ＥＬ素子の駆動方法のブロック
図を図1に示す。有機ＥＬパネル１４に設けられた温度
及び照度測定用の有機ＥＬ素子に一定の電圧を加えたと
きの電流値を測定することにより温度情報及び照度情報
を電流検出回路１３は受け取り補正データ発生回路１１
に伝える。FIG. 1 is a block diagram showing a method for driving an organic EL device according to the present invention. The current detection circuit 13 receives the temperature information and the illuminance information by measuring a current value when a constant voltage is applied to the organic EL element for measuring the temperature and the illuminance provided on the organic EL panel 14, and the correction data generation circuit 11
Tell
【００１０】補正データ発生回路１１は電流検出回路１
３より得られたデータと予め設定された照度と発光輝度
の関係から補正データを駆動回路１２に伝える。駆動回
路１２は補正データと表示データより駆動波形を発生さ
せ有機ＥＬパネル１４に印加することにより外部環境に
合った最適な輝度で発光させる。有機ＥＬ素子に逆バイ
アスで５Ｖを印加して、電流値を測定した結果を表１に
示す。The correction data generation circuit 11 includes a current detection circuit 1
The correction data is transmitted to the drive circuit 12 based on the relationship between the data obtained from Step 3 and the preset illuminance and light emission luminance. The drive circuit 12 generates a drive waveform from the correction data and the display data, and applies the drive waveform to the organic EL panel 14 to emit light at an optimum luminance suitable for an external environment. Table 1 shows the results obtained by applying a reverse bias of 5 V to the organic EL element and measuring the current value.
【００１１】[0011]
【表１】 [Table 1]
【００１２】本発明に関わる有機ＥＬパネル２１の平面
図を図２に示す。有機ＥＬパネル２１には、比較的大き
な８字形状の７セグメント表示要素２２が左側に４桁、
比較的小さな８字形状の７セグメント表示要素が右側に
２桁設けられている。この左側の４桁で時刻の時分を表
示し、右側の２桁で秒の表示を行う時計表示用の発光表
示パネルである。また、７セグメント表示要素２２以外
に照度測定用ＥＬ素子２３が見切り内、温度測定用ＥＬ
素子２４が筐体またはモジュールの外枠で遮光される位
置に設けられている。FIG. 2 is a plan view of the organic EL panel 21 according to the present invention. The organic EL panel 21 has a relatively large 8-segment 7-segment display element 22 with four digits on the left side.
A relatively small 8-segment seven-segment display element is provided on the right side in two digits. This is a light-emitting display panel for clock display that displays the hour and minute of the time with the four digits on the left side and displays the seconds with the two digits on the right side. In addition to the 7-segment display element 22, an illuminance measurement EL element 23 is provided within
The element 24 is provided at a position where light is shielded by the outer frame of the housing or the module.
【００１３】図３に本発明の有機ＥＬ素子駆動方法の具
体例を説明する回路図を示す。表示用ＥＬ素子３０２の
端子にはスイッチ３０３、３０４が取り付けられ、駆動
回路３０９とＧＮＤ間に接続して表示を行う状態とＶｃ
ｃと電流検出回路３０１に接続して照度を測定する状態
に切り替えられる。 本実施例では、５Ｖ程度の高い電圧
で測定できるため逆バイアスで印加しているが、発光し
ない程度の電圧であれば順バイアスでも構わない。FIG. 3 is a circuit diagram illustrating a specific example of the organic EL element driving method of the present invention. Switches 303 and 304 are attached to the terminals of the display EL element 302, and a state in which display is performed by connecting between the drive circuit 309 and GND and Vc
c and connected to the current detection circuit 301 to switch to a state where illuminance is measured. In this embodiment, the measurement is performed at a high voltage of about 5 V, so that the voltage is applied with a reverse bias.
【００１４】電流検出回路３０１ではスイッチ３０３が
抵抗３０５に接続され、抵抗３０５の両端の電圧を検出
することにより電流値を測定する。 具体的には抵抗３０
５の両端の電圧を電圧増幅回路３０６で増幅後、Ａ／Ｄ
コンバータ３０７でデジタルデータに変換して検出デー
タとして出力する。補正データ発生回路３０８では電流
検出回路３０１で検出されたデータと予めＲＯＭ等で用
意された照度と有機ＥＬ素子３０２の最適な発光輝度の
関係から発光輝度を決定して、その補正データを駆動回
路３０９に出力する。In the current detection circuit 301, a switch 303 is connected to a resistor 305, and a current value is measured by detecting a voltage across the resistor 305. Specifically, the resistor 30
5 is amplified by the voltage amplifying circuit 306, and the A / D
The data is converted into digital data by the converter 307 and output as detection data. The correction data generation circuit 308 determines the light emission luminance from the relationship between the data detected by the current detection circuit 301, the illuminance prepared in advance in a ROM or the like, and the optimum light emission luminance of the organic EL element 302, and outputs the correction data to a drive circuit. 309.
【００１５】駆動回路３０９では補正データと表示デー
タから駆動波形を作り表示用ＥＬ素子３０２を発光させ
る。 また発光させている間はスイッチ３０３が駆動回路
３０９にスイッチ３０４がＧＮＤに接続されている。同
期信号発生回路３１０は、スイッチ３０３、３０４、Ａ
／Ｄコンバータ３０７、補正データ発生回路３０８およ
び駆動回路３０９に必要な同期信号を発生し供給してい
る。The drive circuit 309 generates a drive waveform from the correction data and the display data, and causes the display EL element 302 to emit light. During light emission, the switch 303 is connected to the drive circuit 309 and the switch 304 is connected to GND. The synchronization signal generation circuit 310 includes switches 303 and 304, A
A necessary synchronization signal is generated and supplied to the / D converter 307, the correction data generation circuit 308, and the drive circuit 309.
【００１６】図４は本発明の有機ＥＬ素子駆動方法の別
の具体例を説明するための回路図である。 有機ＥＬパ
ネル４０２には表示用ＥＬ素子４０３の他に照度測定用
ＥＬ素子４０４と温度測定用ＥＬ素子４０５が同一の工
程で作成され、温度測定用ＥＬ素子４０５は筐体または
外枠等で遮光される位置に作成する。電流検出回路４０
１ではスイッチ４０６が照度測定用ＥＬ素子４０４と温
度測定用ＥＬ素子４０５に接続され、温度と照度を切り
替えて測定できるようになっている。具体的には最初に
スイッチ４０６が照度測定用ＥＬ素子４０４に接続さ
れ、抵抗４０７の両端の電圧を電圧増幅回路４０８で増
幅後、Ａ／Ｄコンバータ４０９でデジタルデータに変換
して温度誤差が含まれた照度データとして出力される。
次にスイッチ４０６が温度測定用ＥＬ素子４０５に接続
され同様の測定をして温度データとして出力される。FIG. 4 is a circuit diagram for explaining another specific example of the organic EL element driving method of the present invention. On the organic EL panel 402, in addition to the display EL element 403, an illuminance measurement EL element 404 and a temperature measurement EL element 405 are formed in the same process. To be created at the location Current detection circuit 40
In 1, the switch 406 is connected to the illuminance measuring EL element 404 and the temperature measuring EL element 405 so that the temperature and the illuminance can be switched to measure. Specifically, first, the switch 406 is connected to the illuminance measurement EL element 404, and the voltage at both ends of the resistor 407 is amplified by the voltage amplifier circuit 408, and then converted to digital data by the A / D converter 409 to include a temperature error. It is output as illuminance data.
Next, the switch 406 is connected to the temperature measuring EL element 405, performs the same measurement, and outputs the data as temperature data.
【００１７】補正データ発生回路４１０では電流検出回
路４０１で検出された照度データより温度データを引い
て照度データとし、最適な発光輝度を決定してその補正
データを駆動回路４１０に出力する。 照度と最適発光輝
度、温度と発光輝度の関係は前例と同様に予めＲＯＭ等
で用意される。駆動回路４１０では補正データと表示デ
ータから駆動波形を作り表示用ＥＬ素子４０３を発光さ
せる。同期信号発生回路４１２はスイッチ４０６、Ａ／
Ｄコンバータ４０９、補正データ発生回路４１０、駆動
回路４１１に必要な同期信号を発生し供給している。The correction data generation circuit 410 subtracts temperature data from the illuminance data detected by the current detection circuit 401 to obtain illuminance data, determines an optimum light emission luminance, and outputs the correction data to the drive circuit 410. The relationship between the illuminance and the optimum light emission luminance and the relation between the temperature and the light emission luminance are prepared in advance in a ROM or the like as in the previous example. The drive circuit 410 generates a drive waveform from the correction data and the display data, and causes the display EL element 403 to emit light. The synchronization signal generation circuit 412 has a switch 406, A /
Necessary synchronization signals are generated and supplied to the D converter 409, the correction data generation circuit 410, and the drive circuit 411.
【００１８】ここで、電流測定方法として抵抗を挿入し
て電圧を測定する以外の方法でもよい。また、Ａ／Ｄ、
補正データ発生回路、駆動回路はデジタルで処理する以
外にアナログで処理しても構わない。Here, as a current measuring method, a method other than measuring a voltage by inserting a resistor may be used. A / D,
The correction data generation circuit and the drive circuit may be processed in analog as well as in digital.
【００１９】[0019]
【発明の効果】本発明の有機ＥＬ素子駆動方法を用いる
事により、外付けセンサーを用いずに外部環境に合わせ
た発光輝度で表示させることができ、小型、軽量で見や
すい表示が可能な有機ＥＬ表示モジュールを提供でき
る。 このため、腕時計などの、小型・ローパワー・ロー
コスト・ファッション性が要求される製品に用いると製
品としての完成度を高める事ができ、本発明を用いる事
による効果は大きい。By using the organic EL element driving method of the present invention, an organic EL device can be displayed with a light emission luminance suitable for an external environment without using an external sensor, and a small, lightweight, and easy-to-read organic EL device can be displayed. Display module can be provided. Therefore, when used in products requiring small size, low power, low cost and fashionability, such as watches, the degree of perfection as a product can be increased, and the effect of using the present invention is great.
【図１】本発明の有機ＥＬ素子駆動方法のブロック図FIG. 1 is a block diagram of an organic EL element driving method according to the present invention.
【図２】図１の有機ＥＬ素子駆動方法で駆動する有機Ｅ
Ｌパネルの平面図FIG. 2 shows an organic EL device driven by the organic EL device driving method of FIG.
Plan view of L panel
【図３】本発明の有機ＥＬ素子駆動方法を説明するため
の回路図FIG. 3 is a circuit diagram for explaining an organic EL element driving method of the present invention.
【図４】本発明の別の有機ＥＬ素子駆動方法を説明する
ための回路図FIG. 4 is a circuit diagram for explaining another organic EL element driving method of the present invention.
【図５】従来例を示すブロック図FIG. 5 is a block diagram showing a conventional example.
【図６】従来例を示す有機ＥＬ表示モジュールの平面図FIG. 6 is a plan view of an organic EL display module showing a conventional example.
１１、３０８、４１０、５４ 補正データ発生回路 １２、３０９、４１１、５５ 駆動回路 １３、３０１、４０１ 電流検出回路 １４、２１、４０２、５６、６２ 有機ＥＬパネル ２２、３０２、４０３、６３ 表示用ＥＬ素子 ２３、４０４ 照度測定用ＥＬ素子 ２４、４０５ 温度測定用ＥＬ素子 ３０３、３０４、４０６ スイッチ ３０５、４０７ 抵抗 ３０６、４０８ 電圧増幅回路 ３０７、４０９ Ａ／Ｄコンバータ ３１０、４１２ 同期信号発生回路 ３１１、４１３ ＣＰＵ ５１、６４ 温度センサー ５２、６５ 照度センサー ５３ 検出回路 ６１ 有機ＥＬ表示モジュール 11, 308, 410, 54 Correction data generation circuit 12, 309, 411, 55 Driving circuit 13, 301, 401 Current detection circuit 14, 21, 402, 56, 62 Organic EL panel 22, 302, 403, 63 Display EL Element 23, 404 Illuminance measurement EL element 24, 405 Temperature measurement EL element 303, 304, 406 Switch 305, 407 Resistance 306, 408 Voltage amplifier circuit 307, 409 A / D converter 310, 412 Synchronous signal generation circuit 311, 413 CPU 51, 64 Temperature sensor 52, 65 Illuminance sensor 53 Detection circuit 61 Organic EL display module
フロントページの続き (72)発明者 星野 雅文 千葉県千葉市美浜区中瀬１丁目８番地 株 式会社エスアイアイ・アールディセンター 内 (72)発明者 藤田 進 千葉県千葉市美浜区中瀬１丁目８番地 株 式会社エスアイアイ・アールディセンター 内 (72)発明者 赤瀬 篤也 千葉県千葉市美浜区中瀬１丁目８番地 株 式会社エスアイアイ・アールディセンター 内 Ｆターム(参考） 3K007 AB00 DA00 GA00 GA04 5C080 AA06 BB02 DD04 DD27 EE05 EE28 FF09 JJ01 JJ02 Continuation of front page (72) Inventor Masafumi Hoshino 1-8-1, Nakase, Mihama-ku, Chiba-shi, Chiba Inside SIIR D Center (72) Inventor Susumu Fujita 1-8, Nakase, Nakase, Mihama-ku, Chiba-shi, Chiba (II) Inventor Atsuya Akase 1-8-8 Nakase, Mihama-ku, Chiba-shi, Chiba Prefecture F-term (reference) 3K007 AB00 DA00 GA00 GA04 5C080 AA06 BB02 DD04 DD27 EE05 EE28 FF09 JJ01 JJ02
Claims (13)
と、温度または照度を測定するための測定用有機ＥＬ素
子と、を備えることを特徴とする有機ＥＬ表示装置。1. An organic EL display device comprising: a display element organic EL element for displaying information; and a measurement organic EL element for measuring temperature or illuminance.
するための温度測定用有機ＥＬ素子と、照度を測定する
ための照度測定用有機ＥＬ素子と、を個別に備えること
を特徴とする請求項１に記載の有機ＥＬ表示装置。2. The method according to claim 1, wherein the measuring organic EL element includes a temperature measuring organic EL element for measuring temperature and an illuminance measuring organic EL element for measuring illuminance. The organic EL display device according to claim 1.
定用有機ＥＬ素子が同一の有機ＥＬパネルに設けられた
ことを特徴とする請求項１または２に記載の有機ＥＬ表
示装置。3. The organic EL display device according to claim 1, wherein the display EL element and the organic EL element for measurement are provided on the same organic EL panel.
測定用有機ＥＬ素子が同一の面積であることを特徴とす
る請求項２に記載の測定用の有機ＥＬ表示装置。4. The measuring organic EL display device according to claim 2, wherein the temperature measuring organic EL element and the illuminance measuring organic EL element have the same area.
要素有機ＥＬ素子を組み込む筐体により遮光されている
ことを特徴とする請求項２記載の有機ＥＬ表示装置。5. The organic EL display device according to claim 2, wherein the illuminance measurement organic EL element is shielded from light by a housing incorporating the display element organic EL element.
と、温度または照度を測定するための測定用有機ＥＬ素
子と、前記測定用有機ＥＬ素子の測定結果に基づいて補
正データを作成する補正データ発生回路と、前記補正デ
ータと表示データに応じた駆動波形を前記表示要素有機
ＥＬ素子に印加する駆動回路と、を備えることを特徴と
する有機ＥＬ表示装置。6. A display element organic EL element for displaying information, a measurement organic EL element for measuring temperature or illuminance, and correction data for creating correction data based on a measurement result of the measurement organic EL element. An organic EL display device comprising: a generation circuit; and a drive circuit for applying a drive waveform according to the correction data and the display data to the display element organic EL element.
に電圧を加えて電流値を測定することにより前記有機Ｅ
Ｌ素子に照射されている光強度を測定し、前記測定結果
に基づいて前記有機ＥＬ素子の発光強度を補正すること
を特徴とする有機ＥＬ素子の駆動方法。7. The organic EL device in a state where light is applied to the organic EL device is measured by applying a voltage thereto and measuring a current value.
A method for driving an organic EL element, comprising: measuring a light intensity applied to an L element, and correcting an emission intensity of the organic EL element based on the measurement result.
に電圧を加えて電流値を測定することにより前記有機Ｅ
Ｌ素子に照射されている光強度を測定し、前記測定結果
に基づいて表示用有機ＥＬ素子の発光強度を補正するこ
とを特徴とする有機ＥＬ素子の駆動方法。8. The organic EL device in a state where light is applied thereto is applied with a voltage, and a current value is measured.
A method for driving an organic EL element, comprising: measuring the intensity of light applied to an L element, and correcting the emission intensity of the display organic EL element based on the measurement result.
ていない状態の有機ＥＬ素子に電圧を加えて電流値を測
定することにより前記有機ＥＬ素子の温度を測定し、前
記測定結果に基づいて前記有機ＥＬ素子の発光強度を補
正することを特徴とする有機ＥＬ素子の駆動方法。9. The temperature of the organic EL element is measured by applying a voltage to the organic EL element in a state in which the organic EL element is not irradiated with external light and measuring the current value by shielding the organic EL element. A method for driving the organic EL element, wherein the light emission intensity of the organic EL element is corrected based on the correction.
れていない状態の有機ＥＬ素子に電圧を加えて電流値を
測定することにより前記有機ＥＬ素子の温度を測定し、
前記測定結果に基づいて表示用有機ＥＬ素子の発光強度
を補正することを特徴とする有機ＥＬ素子の駆動方法。10. A temperature of the organic EL element is measured by applying a voltage to the organic EL element in a state where the organic EL element is not irradiated with external light and measuring a current value,
A method of driving an organic EL element, comprising correcting the emission intensity of the display organic EL element based on the measurement result.
逆バイアスであることを特徴とする請求項７〜１０のい
ずれか１項に記載の有機ＥＬ素子の駆動方法。11. The driving method for an organic EL element according to claim 7, wherein the voltage applied to the organic EL element is a reverse bias.
子に電圧を加えて測定した電流値と、外光が照射されて
いない状態の前記有機ＥＬ素子に電圧を加えて測定した
電流値との差を光強度として前記有機ＥＬ素子の発光強
度を補正することを特徴とする有機ＥＬ素子の駆動方
法。12. A current value measured by applying a voltage to an organic EL element in a state where light is applied, and a current value measured by applying a voltage to the organic EL element in a state where no external light is applied. A method of driving the organic EL element, wherein the light emission intensity of the organic EL element is corrected by using the difference of the light intensity as the light intensity.
有機ＥＬ素子に電圧を加えて測定した電流値と、外光が
照射されていない状態の温度測定用有機ＥＬ素子に電圧
を加えて測定した電流値との差を光強度として表示用有
機ＥＬ素子の発光強度を補正することを特徴とする有機
ＥＬ素子の駆動方法。13. A current value measured by applying a voltage to an illuminance measuring organic EL element in a state where light is applied, and a voltage applied to a temperature measuring organic EL element in a state where external light is not applied. A method for driving an organic EL element, comprising correcting a light emission intensity of a display organic EL element by using a difference from a measured current value as a light intensity.
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|---|---|---|---|
| JP20184099A JP3792950B2 (en) | 1999-07-15 | 1999-07-15 | Organic EL display device and driving method of organic EL element |
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